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參數資料
| 型號： | TPA6020A2RGW |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類： | 音頻／視頻放大 |
| 英文描述： | 2.15 W, 2 CHANNEL, AUDIO AMPLIFIER, PQCC20 |
| 封裝： | PLASTIC, QFN-20 |
| 文件頁數： | 5/27頁 |
| 文件大小： | 2083K |
| 代理商： | TPA6020A2RGW |
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APPLICATION INFORMATION
STEREO OPERATION
Bypass Capacitor Configuration
VDD and Decoupling Capacitors
FULLY DIFFERENTIAL AMPLIFIER
APPLICATION SCHEMATICS
Advantages of Fully Differential Amplifiers
TPA6020A2
SLOS458B – JULY 2005 – REVISED AUGUST 2005
DAC has a lower mid-supply voltage than that of
the TPA6020A2, the common-mode feedback
circuit compensates, and the outputs are still
The TPA6020A2 is a stereo amplifier that can be
biased at the mid-supply point of the TPA6020A2.
operated in either a mono or stereo configuration.
The inputs of the TPA6020A2 can be biased from
Each channel has independent shutdown control,
0.5 V to VDD - 0.8 V. If the inputs are biased
giving the user greater flexibility.
outside of that range, input-coupling capacitors
are required.
Mid-supply bypass capacitor, C(BYPASS), not
If Bypass capacitors are used, it is necessary to use
required: The fully differential amplifier does not
separate bypass capacitors for each bypass pin. (See
require a bypass capacitor. Any shift in the
the section entitled Bypass Capacitor (CBYPASS) and
mid-supply voltage affects both positive and
Start-Up Time)
negative channels equally, thus canceling at the
differential output. Removing the bypass capaci-
tor slightly worsens power supply rejection ratio
(kSVR), but a slight decrease of kSVR may be
Each VDD pin must have a separate power supply
acceptable when an additional component can be
decoupling capacitor (see section entitled Decoupling
eliminated (see Figure 18).
Capacitor (CS)). A single, bulk decoupling capacitor is
Better RF-immunity: GSM handsets save power
also recommended. Additionally, the left and right
by turning on and shutting off the RF transmitter
channel VDD pins must be tied together on the PCB.
at a rate of 217 Hz. The transmitted signal is
picked up on input and output traces. The fully
differential amplifier cancels the signal much
The TPA6020A2 is a fully differential amplifier with
better than the typical audio amplifier.
differential inputs and outputs. The fully differential
amplifier consists of a differential amplifier and a
common-mode amplifier. The differential amplifier
ensures that the amplifier outputs a differential volt-
matics for differential and single-ended inputs. Typical
age that is equal to the differential input times the
values are shown in Table 1.
gain. The common-mode feedback ensures that the
common-mode voltage at the output is biased around
Table 1. Typical Component Values
VDD/2 regardless of the common-mode voltage at the
input.
COMPONENT
VALUE
RI
40 k
C(BYPASS)(1)
0.22 F
Input coupling capacitors not required: A fully
CS
1 F
differential amplifier with good CMRR, like the
CI
0.22 F
TPA6020A2, allows the inputs to be biased at
voltage other than mid-supply. For example, if a
(1)
C(BYPASS) is optional.
13
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相關代理商/技術參數 |
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| TPA6020A2RGWR | 功能描述:音頻放大器 Stereo Fully Diff Class-AB RoHS:否 制造商:STMicroelectronics 產品:General Purpose Audio Amplifiers 輸出類型:Digital 輸出功率: THD + 噪聲: 工作電源電壓:3.3 V 電源電流: 最大功率耗散: 最大工作溫度: 安裝風格:SMD/SMT 封裝 / 箱體:TQFP-64 封裝:Reel |
| TPA6020A2RGWRG4 | 功能描述:音頻放大器 Stereo Fully Diff Class-AB RoHS:否 制造商:STMicroelectronics 產品:General Purpose Audio Amplifiers 輸出類型:Digital 輸出功率: THD + 噪聲: 工作電源電壓:3.3 V 電源電流: 最大功率耗散: 最大工作溫度: 安裝風格:SMD/SMT 封裝 / 箱體:TQFP-64 封裝:Reel |
| TPA6020A2RGWT | 功能描述:音頻放大器 Stereo Fully Diff Class-AB RoHS:否 制造商:STMicroelectronics 產品:General Purpose Audio Amplifiers 輸出類型:Digital 輸出功率: THD + 噪聲: 工作電源電壓:3.3 V 電源電流: 最大功率耗散: 最大工作溫度: 安裝風格:SMD/SMT 封裝 / 箱體:TQFP-64 封裝:Reel |
| TPA6020A2RGWTG4 | 功能描述:音頻放大器 Stereo Fully Diff Class-AB RoHS:否 制造商:STMicroelectronics 產品:General Purpose Audio Amplifiers 輸出類型:Digital 輸出功率: THD + 噪聲: 工作電源電壓:3.3 V 電源電流: 最大功率耗散: 最大工作溫度: 安裝風格:SMD/SMT 封裝 / 箱體:TQFP-64 封裝:Reel |
| TPA6021A4 | 制造商:TI 制造商全稱:Texas Instruments 功能描述:2-W STEREO AUDIO POWER AMPLIFIER WITH ADVANCED DC VOLUME CONTROL |
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